Browser App Creator

Purpose

Creates production-ready single-file web applications that work offline with zero setup. Perfect for quick tools, dashboards, trackers, and prototypes.

For ADHD users: Large buttons (60px+), auto-save everything, visual feedback, zero configuration. For SDAM users: All data persists in localStorage with timestamps. For all users: Download and use immediately - no server, no build step, no dependencies.

Activation Triggers

User says: "create app", "build tool", "make dashboard", "create tracker"
Requests for: habit tracker, todo list, timer, calculator, form, visualization
Any request for a browser-based interface or tool

Core Workflow

1. Understand Requirements

Ask clarifying questions only if absolutely necessary:

{
  app_type: "dashboard|tracker|form|tool|visualization",
  primary_function: "What does the app do?",
  data_to_track: ["What data needs to be stored?"],
  key_actions: ["What can users do?"],
  visual_requirements: "Any specific layout needs?"
}

2. Generate Single-File App

Template structure:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>{App Name}</title>
  <style>
    /* ADHD-Optimized Styles */
  </style>
</head>
<body>
  <!-- App UI -->
  <script>
    // App Logic + localStorage
  </script>
</body>
</html>

3. ADHD Optimization Requirements

Required UI elements:

✅ Buttons: Minimum 60px height, high contrast
✅ Dark mode: Default theme (can toggle)
✅ Auto-save: Every action saves to localStorage
✅ Visual feedback: Success/error messages
✅ Mobile responsive: Works on all screen sizes
✅ Large touch targets: 44px minimum for mobile

CSS Requirements:

/* ADHD-Optimized Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #1a1a1a;
  color: #e0e0e0;
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

button {
  min-height: 60px;
  padding: 15px 30px;
  font-size: 18px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  background: #4a9eff;
  color: white;
}

button:hover {
  background: #357abd;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(74, 158, 255, 0.4);
}

button:active {
  transform: translateY(0);
}

input, textarea, select {
  min-height: 50px;
  padding: 12px 15px;
  font-size: 16px;
  border: 2px solid #333;
  border-radius: 6px;
  background: #2a2a2a;
  color: #e0e0e0;
  width: 100%;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: #4a9eff;
  box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.2);
}

4. localStorage Pattern

Always include:

// localStorage Manager
const Storage = {
  key: 'app-name-data',

  save(data) {
    try {
      localStorage.setItem(this.key, JSON.stringify({
        ...data,
        lastUpdated: new Date().toISOString()
      }));
      this.showFeedback('✅ Saved!');
    } catch (error) {
      this.showFeedback('❌ Save failed', true);
      console.error('Save error:', error);
    }
  },

  load() {
    try {
      const data = localStorage.getItem(this.key);
      return data ? JSON.parse(data) : this.getDefaults();
    } catch (error) {
      console.error('Load error:', error);
      return this.getDefaults();
    }
  },

  getDefaults() {
    return {
      items: [],
      settings: {},
      created: new Date().toISOString()
    };
  },

  showFeedback(message, isError = false) {
    const feedback = document.createElement('div');
    feedback.textContent = message;
    feedback.style.cssText = `
      position: fixed;
      top: 20px;
      right: 20px;
      padding: 15px 25px;
      background: ${isError ? '#ff4444' : '#44ff88'};
      color: #000;
      border-radius: 8px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(0,0,0,0.3);
      z-index: 1000;
      animation: slideIn 0.3s ease;
    `;
    document.body.appendChild(feedback);
    setTimeout(() => feedback.remove(), 2000);
  }
};

// Auto-save on any change
function autoSave(data) {
  Storage.save(data);
}

// Load on page load
let appData = Storage.load();

5. App Templates

See templates.md for complete examples of:

Dashboard: Metrics, charts, status indicators
Tracker: Habits, tasks, progress
Form: Data entry, validation, submission
Tool: Calculators, converters, utilities
Visualization: Charts, graphs, timelines

6. Deliver the App

Format:

✅ **{App Name}** complete!

**Features**:
- {Feature 1}
- {Feature 2}
- {Feature 3}

**Usage**:
1. Save the file as `{app-name}.html`
2. Open in any browser
3. Works offline
4. Data auto-saves to your browser

**Customization**:
- Colors: Edit the CSS variables at th

...

browser-app-creator

SKILL.md